What that means is that integrated vertically as well as horizontally.
就是指纵向的整体和横向的整体。
I can also describe a particle going up and down.
我也可以描述一个质点的纵向运动
So it's vertically interconnected.
所以是纵向相互联系的。
So here is a longitudinal study that was done by John Carter.
所以下面讲讲John,Carter所作的纵向研究。
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